Lubricator.



1. F. MCCANNA.

LUBRIGATOR.

APPucATmN F1LFD FFB.1,1906. RENFwFD 1uLY a, 1915.

2 SHEETS-SH EET l.

Patented Feb. 22,1916.

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JOHN 1E'. MCCANNA, '0F CHICAGO, ILLINOIS, ASSIGNOR TO MoCORD'a COMPANY,OF CHICAGO, ILLINOIS, A CORPORATION F NEW JERSEY.

LUBRroAToR.

Specification. of Letters Patent.

Patented Feb. 22, 1916.

Application led February 7, 1906, Serial No. 299,939. Renewed July B,1915. Serial No. 38,782.

To all 'whom it may concern.' l

Be it known that I, ,lor-IN F. MCCANNA, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois.` haveinvented certain new and useful Improvements in Lubricators, of whichthe following is a specification, reference being had therein to theaccompanying drawings.

rlhis invention relates to improvements in torce Jfeed lubricators, andhas particular reference to lubricators of that type in which a pair orIcooperating pumps is employed for delivering the lubricant from thereservoir to the part being lubricated.

The invention consists of the organiza tions and arrangements of partshereinafter particularly described and then pointed out in the appendedclaims.

In the accompanying drawings, Figure 1 is a vertical longitudinalsectionalv -view of the reservoir showing two sets of coperating pumps,parts being shown in section for convenience of illustration: Fig. 2 isavertical sectionalview on the line 2 2 of Fig. 1: Fig. 3 is a similarview on the line 3-3 of Fig. 1, illustrating the valve operatingconnection; F ig. 4 is a view in elevation showing a modified form ofsight feed device; Fig. 5 is a sectional view on the line 5 5 oi' Fig.4; and Fig. 6 relates to a detail of said modification. 'l y In theaccompanying drawings, the numeral designates the lubricant reservoirwhich may be of any suitable size and shape, it being sho-wn in thepresent instance as rectangular. The reservoir 10 is provided with acover 11 having a depending flange 12 which fits within the reservoir.The reservoir 10 has securedv thereto at the ends upwardly extendingthreaded studs 13 which pass through suitable openings in the cover 11and receive nuts 14 to secure the reservoir to the cover.

IVithin the reservoir and depending from the cover 11 are one or moretandem sets or pairs of cooperating pumps. In the present instance, asshown in Fig. 2, the pump bodies of each set of pumps are made from anintegral casting, although this is not material. The barrel 15 of one ofthe pumps, herein designated the primary pump, is provided at its lowerend with a commoninlet and outlet port 16 which communicates with ahorizontal boreV 17 formed in the body casting'. An inlet tube 18 havinga passage 18 extends to adjacent the bottom of the reservoir so as toenable the primary pump to practically exhaust the contents of thereservoir, and the passage therein also enters the bore 17 below theport 16. A. vertical tube 19 forming an auxiliary reservoir or standpipe, lscrews into a suitable threaded socket in the casting andcommunicates-with the bore 17 above the vport 16. The upper end of thetube 19 is closed and screw threaded and extends through a suitableaperture in the cover. A nut 20 screwed upon the threaded end of thetube and ccperating with a shoulder on the tube clamps the same to thecover. has'an air port 21 and the cover 11 is also provided withl anopening 22 to admit air to the reservoir. A duct 23 leads'from thestandpipe to the bore 17. The barrel 24: ofthe auxiliary or deliverypump has a common inlet and outlet port 25 at its lower end and below.the outlet of the duct 23, while apassage 26 passes through the castingand extends upwardly through an extension 27 of the latter. Theextension 27 is shouldered near its upper end to abut against the cover11 and beyond the shoulder is screw threaded and passes through anopening in the cover, receiving a suitable nut 28 by means of which theextension is clamped to the cover.

In the present embodiment of the invention the plungers 29 andl 30 ofthe primary andv auxiliary pumps, respectively, are caused toreciprocate simultaneously in the same direction.- To .this end a crosshead 31 is fixed to the upper end of the plunger and is provided with anopening through which extends an extension 32 of the plunger 29. Thisextension is provided with abutments 33 and 341 with which the crosshead cooperates 'to reciprocate the plunger.

lThis tube i Such cross head is also provided with a suitable openingfor the tube19 which provides a guide for the cross head.

The cross head is bifurcated as shown and within such bifurcationrotates an eccentric 35 to reciprocate the cross head. This eccentric iscarried by a shaft 36, the ends of which are journaled in dependinghangers 37 which are fixed to the cover 11, one at each end thereof. Aworm gear 38 on the eccentric shaft receives motion from a worm 39 whichis housed within an enlargement O on the cover and the shaft of whichpasses through and is ournaled on a vertical plate L11 formed on thecover. This plate, when the lubricator is used on an automobile,provides a convenient means for securing the lubricator to the dash. Theend of the worm shaft extends outside of the reservoir and is designedto receive motion from any suitable source of power.

en oscillating valve 42 is seated in the bore 17 and is tapered asshown, the bore being correspondingly tapered to insure a snug fit. Asuitable shaft 43 passes through a longitudinal opening in the valve,and has each end journaled in the lower end of the adjacent hanger 3T,as shown in Fig. 1. The valve is provided at its reduced end with athreaded extension which receives a nut 414. A coiled expansion springf5 surrounds the threaded extension and reacts against the nut to holdthe valve pressed to its seat.

The valve is provided with a pair of diametrically opposite grooves orchannels 16 and 47. The channel 416 is always in communication with theport 16 and is designed to place such port in communication with theinlet tube 18 and the stand pipe 19 in alternation. The channel 17 islikewise continually in communication with the port 25 of the auxiliarypump and is adapted to place such port in communication with the duct 23and the passage 26 in alternation, the arrangement being such that whenthe port 16 is in communication with the stand pipe 19, which occurs onthe down or discharge stroke of the pump plunger, the port 25 is incommunication with the passage 26, and on the other hand, during theupstroke of the plunger the port 16 is in communication with 'the inlet18 and the duct 23 is in communication with the port 25. The foregoingdescription of the pumps and valve applies to each set of pumps andwhere more than one set of pumps are employed, the valve 42 for each setis carried by the same shaft, such shaft being extended the requireddistance for this purpose, as shown in Fig. 1. The shaft 43 has fixedthereto a crank arm 48 provided with a crank pin 49, while the shaft 36is provided with an eccentric 50 offset diametrically opposite to theeccentric 35. The sleeve 51 which cooperates with the eccentric 50 isprovided with an arm 52A having at its lower end an elongated slot 53which receives the crank pin 49.

The capacity of the stand pipe is greater than the maximum delivery ofthe primary pump, while the capacity of the auxiliary pump is greaterthan thatof the primary pump, this being due in the present instance tothe greater cross-sectional area of the auxiliary pump. In order to varythis difference in the relative capacities of the pumps and consequentlythe rate of delivery of the lubricator, l preferably provide means forvarying the stroke of the primary pump. To this end the upper end ofkthe extension 32 is screw threaded and the abutment 3l is in the form ofan internally threaded sleeve screwing upon the threaded end of theextension 32 and passing freely through the cover. The upper end of the.sleeve 311 is provided with a suitable head by means of which it may beturned to adjust the same either to eliminate or provide lost motionbetween the plunger and the cross head. A set bolt screwing into thesleeve serves to lock the adjustable abutment in its adjusted position.The difference in the capacities of the pumps is compensated for by theadmission of a supply of air into the stand pipe 19 through theair port21 at each operation of the auxiliary pump, this supply of' air beingequivalent to the ydifference between the capacity of such pump and thequantity of oil in the stand pipe.

In the operation of the lubricator, a reciprocatory motion is impartedto the cross head 31 by the eccentric 35. Upon the upstroke of theplungers, the valve channels 46 and t? then being in the positions indicated by the dotted lines in Fig. 2, oil is sucked in through the inlet1S into the barrel of the primary pump, and assuming that the lubricatorhas been previously operated and that the stand pipe contains a supplyof oil, this oil is drawn from such stand pipe on the suction stroke ofthe auxiliary pump through the duct 23 into the barrel of such pump, andis followed by a supply of air corresponding to the difference incapacity of the pumps. During this upward movement of the cross head',owing to the elongation of the slot 53 the arm 52 simply rises withoutturning the valve. Upon the completion of the suction or up stroke ofthe plungers and while the eccentric 35 is passing the center the end ofthe slot reaches the crank pin and turns the same far enough to cut offthe inlet 18 and duct 23 and. throw the port 16 into communication withthe stand pipe 19 and the portI 25 into communication with the passage26. The cross head then begins its reverse movement, moving the plungersdownwardly and during this operation the oil previously drawn into thebarrel 15 is forced into the stand pipe while the oil in the barrel 24is discharged therefrom and forced to the bearing. The discharge strokehaving been completed and while the eccentric is again passing thecenter the valve is shifted.` to its former position and the cycle ofoperations is continued.

By reason of the construction and operation described, and owing to thedifference in the capacities of the pumps and the admission of air tothe delivery pump, the charges of oil delivered by the auxiliary pumpare in the form of drops or globules separated from each other by airspaces, as indicated in Fig. i, and this is utilized to determine therate of delivery of oil to the bearing being lubricated.

ris shown in Figs. 1 and 2, a suitable glass tube 55, shown as curved inthe present instance, is connected by a suitable packing gland 56 to theupper end of each discharge extension 27. The upper end of the tubeleads through the plate 4:1 and is connected by a suitable packing gland57 with the conduit 58 which leads to the bearing being lubricated. ltis obvious from the foregoing that it may be readily determined at whatrate the lubricator is delivering oil by noting the size and frequencyof the drops of oil passing through the sight feed glass associated witheach set of pumps.

ln the arrangement heretofore described, each set of coperating pumps isprovided with an individual sight feed glass. rilhis provides a simplearrangement, and where the lubricator is used with an automobile and hasthe cover plate 4:1 located on the dash in front of the seat of thechauffeur, the sight feed devices are readily observable. Another formof sight feed device is illustrated in Figs. 4 and 5 wherein I employ asingle sight feed glass for all of the sets of ceperating pumps, meansbeing provided for connecting the sight feed glass at will with anyparticular set of pumps when it is desired to ascertain the rate ofdelivery of such set. In Fig. 1 the lubricator is shown as provided withtwo sets of pumps, and the sight feed device shown in Fig. i isaccordingly arranged for two sets.

Referring to Figs. 4 and 5, the numeral 59 indicates a vertical baseplate having a suitable grcove in which is located an invertedU-shapedrglass tube 60 the ends of which extend into suitable cavitiesformed in enlargements 61 at the bottom of the base plate. A plug 62screws into each cavity to clamp a sealing ring 63 about the tube toprevent leakage, and a cap nut 64e vis adapted to the plug, as' shown inF ig.

however, is provided at diametrically op.

posite points with a pair of longitudinal channels l69 and 70 which whenthe valve is in the position shown in Fig. 5 communicate at the lowerends, respectively, with the passages 67 and 68, while the upper end ofthe channel 69 communicates with a passage 71 passing through the base59 to the inlet end of the tube 60, the upper end'of the channel 'i0then communicatingwbya passage 72 with the discharge end of the sightfeed tube. The arrangement ofL each valve 65 is ythe same except thatthe passage 73 communicating with the upper end of the channel 69 oflthe upper valve enters the passage 71 and the passage 74 leading fromthe upper lend of the channel communicates with the passage 72. vByreason of this arrangement the full length of the sight feed tube isutilized for each set of pumps for determining the rate ofdelivery. Inthe event that it is desired` to test the rate of delivery of any set ofpumps, the

valve 65 associated therewith is turned so as to cut off the direct feedthrough the port 66 and placethe channels 69 and 70 into communicationwith the passages 67 and 68. The eil then passesthrough the sight tube.

By reason of the arrangement shown and described, a single valve isemployed for each set ory pair of ceperating pumps and this valve isoperated mechanically, thus dispensing with a plurality of gravity orspring seated valves, such as are usually.

employed. When more than one set of cooperating pumps are employed thevalves cfall of the same are operated simultaneously and by a commonoperating mechanism. l y y v Inasmuch as all of the pumps and theoperating mechanism therefor are entirely supported by the stationarycover. and are independent of the reservoir, the latter may be readilydetached from the cover when it is vdesired to attain access to themechanism or to refill the reservoir although a filling hole ispreferably provided in the cover for the latter purpose. This is doneWithout disassembling the pumps or operating mechanism, and Withoutdisconnecting the conduits or oil tubes.

The adjusting device as it extends outside the reservoir enables therate of delivery to be varied Without opening the reservoir, and as suchdevice is reciprocated by the cross head its reciprocation serves toindicate the rate of movement and the length of the stroke of the pump.

Having described my invention What I claim is,-

l. In a lubricator, a 4pair of cooperating pumps each having aninlet-outlet port, and a mechanically operated valve common to bothports.

2. In a lubricator, a main reservoir, a pair of pumps, an auxiliaryreservoir, and a valve common to both pumps and Which when in oneposition connects one of the pumps with the main reservoir and the otherWith the auxiliary reservoir and in its other position connects theformer pump with the auxiliary reservoir and the latter With itsdischarge passage.

3. In a lubricator, a main reservoir, a primary pump to Which lubricantis supplied from a main reservoir, a delivery pump, an auxiliaryreservoir, and a valve for placing the pumps in communication With theauxiliary reservoir in alternation.

'l. In a lubricator, a reservoir, a primary pump, a delivery pump, and avalve which in one position places the primary pump in communicationwith the reservoir and the delivery pump in communication With itsauxiliary reservoir and in its other position conducts to the deliverypump the lubricant discharged by the primary pump.

In a force feed lubricator, a pair of reciprocating pumps, an auxiliaryreservoir to Which the lubricant is delivered by one pump and from whichit is drawn by the other pump, and a. valve common to both pumps forplacing such. auxiliary reservoir in communication With the pumps inalternation.

6. In a lubricator` a reservoir, a primary pump, a delivery pump ofgreater capacity than the primary pump, an auxiliary reser voir, a valvewhich in one position places the primary pump in communication with thereservoir and the delivery pump in communication with the auxiliaryreservoir and in its other position conducts to the auxiliary reservoirthe lubricant discharged by the primary pump, means for varying the rateof delivery of rthe primary pump, and provision for supplying air to thedelivery pump and to compensate for the difference in capacities of thepumps.

7. In a force feed lubricator, a pair of reciprocating pumps ofdifferent capacities, a stand pipe having an air inlet and to Which thelubricant is delivered by the pump of lesser capacity and from which itis drawn by the other pump, and a mechanically operated valve forplacing the stand pipe in communication with the pumps in alternation.

8. In a lubricator, a pair of reciprocating pumps of differentcapacities, an auxiliary reservoir having an air inlet and to which thelubricant is delivered by the pump of lesser capacity and from which itis draivn by the other pump, a valve for placing the auxiliary reservoirin communication With the pumps in alternation, and means for varyingthe stroke of the pump oflesser capacity.

9. In a force feed lubricator, a pair of reciprocating pumps ofdifferent capacities, a stand pipe having an air inlet and to which thelubricant is delivered by the pump of lesser capacity and from which itis drawn by the other pump.l and a mechanically operated valve forplacing the stand pipe in communication with the pumps in alternation,such valve also controlling the inlet and discharge of the lesser andgreater pumps, respectively.

10. In a force feed lubricator, a pair of reciprocating pumps ofdiderent capacities, means for varying the stroke of the pump of lessercapacity, a stand pipe having an air inlet, an oscillating valve commonto both pumps and for placing the stand pipe in communication with thepump of lesser capacity on its discharge stroke and in communicationwith the other pump on its suction stroke.

l1. In a force feed lubricator, a pair of reciprocating pumps ofdifferent capacities, means for varying the stroke of the pump of lessercapacity, a stand pipe having an air inlet, an oscillating valve commonto both pumps and for placing the stand pipe in communication with thepump of lesser capacity on its discharge stroke and in com-k municationWith the other pump on its suction stroke, means for reciprocating thepump plungers, and a connection between such means and the valve foroscillating the latter.

12. In a force feed lubricator, a pair of reciprocating pumps ofdifferent capacities, an eccentric operated cross head fixed to theplunger of the pump of greater capacity, means for creating oreliminating lost motion between the cross head and the plunger of theother pump, a stand pipe having an air inlet and to which the lubricantis delivered by the pump of lesser capacity and from which it is drawnby the other pump,

an oscillating valve controlling the communication between the standpipe and the pumps, and an eccentric for operating the valve between thereciprocations of the plungers.

13. In a force feed lubricator, the combination with a reservoir, of apair of reciprocating pumps of different capacities located therein, astand pipe, a shaft having an eccentric, a cross head fined to theplunger of the pump of greater capacity and actuated by the eccentric,the plunger of the other pump having a pair of abutments with which thecross head cooperates, one of suoli abutments being adjustable to varythe stroke of such pump, an oscillating valve common to both pumps andcontrolling the intake and discharge thereof, a shaft for suoli valve, acrank arm on the shaft and an arm operated by the eccentric shaft andhaving a slot engaging the crank arm and providing lost motion betweenthe parts, whereby when the valve is in one position the pump of lessercapacity is in communication with the reservoir and the other pump isplaced in communication with the stand pipe and when in its otherposition the first pump is in communication with the stand pipe and theother pump is in communication with its discharge conduit.

14. In a lubricator, the combination with a reservoir, a pair ofreciprocating pumps of different capacities, and a stand pipe, of avalve which in one position places the pump of lesser capacity incommunication with the reservoir and the other pump in communicationwith the stand pipe and in its other position places the stand pipe incommunication with the i'irst pump and the other pump in communicationwith the discharge conduit of such pump, and means for oscillating thevalve.

15. In a device of the class described, a reservoir, a cover-plate towhich the reservoir is detachably secured and having a depending hangerat each end, a pump located in the reservoir and secured to the cover, across head fixed to the pump plunger, a shaft journaled in the hangersand having an eccentric for reciprocating the cross head, a pump valve,connection between the shaft and the valve for operating the latter, aworm wheel on the shaft, and a worm journaled on the cover and engagingthe worm wheel.

16. In a lubricator, a pump, a connection between the pump and the partbeing lubricated, a sight feed device, and a valve hav` ing a port whichwhen the valve is in one position registers with the connection, and apair of opposite channels which when the valve is in another positionare put in communication with the connection and the ends of thesight-feed device at opposite sides of the valve to pass the lubricantthrough the said sight feed device.

17. In a lubricator, a pump, a connection leading from the pump to thepart to be lubricated, a sight feed device consisting of a substantiallyU-shaped transparent tube, and a valve between the ends of the tube andhaving a diametrical port and a pair of opposite channels, whereby whenthe valve is in one position the port registers with the connection andwhen in another position the connection at opposite sides of the valveis placed in communication with the ends of the tube.

18. In a lubricator, a pump, a connection leading from the pump to thepart being lubricated, a valve having a port which normally registerswith the connection, and a by-pass consisting of a transparent tube, thesaid valve having opposite passages which when the valve is moved fromits normal to a predetermined position places the connection at oppositesides of the valve in communication with the ends of the tube.

19. In a lubricator, a pair of coperating pumps of different capacities,the pump of greater capacity being the delivery pump, with provision forsupplying a charge of air to the delivery pump to compensate for thedifference in capacity and to separate the charges of oil delivered tothe bearing, and a-transparent tube through which such air separatedcharges pass to the part being lubricated.

20. In a lubricator, a delivery pump with provision for supplying acharge of air to the pump to separate the globules discharged by thelatter, a sight feed device, and a valve which in one position deliversthe oil direct to the part being lubricated and in another positionpasses the oil and air globules through the sight feed device.

:21. In a lubricator, a delivery pump with provision for supplying acharge of air to the pump to separate the globules discharged by thelatter, a sight feed device, and a valve having a port through which theoil normally passes to the part being lubricated, and a transparenttube, the said valve having channels which when such valve is in apredetermined position conducts the oil and air globules to and from thetransparent tube.

22. In a lubricator, the combination with a plurality of sets of primaryand delivery pumps, each delivery pump being of greater capacity thanits associated pump, and provision to supply a charge of air to thedelivery pump at each operation to compensate for the difference incapacity of the pumps and to separate the globules discharged by thedelivery pump, a valve for each set of pumps and having a port throughwhich the oil normally passes to the part being' lubricated, atransparent tube, the vulve of each set of pumps having diametricallydisposed channels adapted when the valve is moved out of its normalposition to place the conduit leading` to the valve into communicationWith the inlet end of the transparent tube and the Conduit from thevulve into communication With the outlet end of the tube.

In a force-feed lubrieator, in combination, two pumps comprisingcooperating cylinders, one of said cylinders having an inlet and theother cylinder having an eutiet; a receptacle intermediate Saidcylinders and communicating therewith; and a single valve member in saidreceptacle adapted properly7 to Connect seid cylinders with sindreceptacle, the first mentioned cylinder with its inlet and the secondmentioned cylinder With its outlet.

In testimony whereof I affix my signature in presence of two Witnesses.

JGHN F. MCCANNA. W'itnesses ELIZABETH MoLrTon. ARTHUR B. SniOLD.

Copies of this patent may be obtained for five cents each.l byaddressing the Commissioner of Patents, Washington, D. C.

